Sync Google Contacts & Calendar With Vtiger 7.4 self hosted

I am looking for a freelancer to help me sync my Google Contacts and Calendar with my Vtiger 7.4 self-hosted application. Ideally, I would like the syncing be automated rather than manual, so that I don't have to constantly monitor the synchronization. This project specifically requires Vtiger 7.4, no other versions. If you can help me with this project, please let me know. Thank you!